EP0111687B1 - Méthode de fabrication d'une bague de segments de commutateur - Google Patents

Méthode de fabrication d'une bague de segments de commutateur Download PDF

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Publication number
EP0111687B1
EP0111687B1 EP83110669A EP83110669A EP0111687B1 EP 0111687 B1 EP0111687 B1 EP 0111687B1 EP 83110669 A EP83110669 A EP 83110669A EP 83110669 A EP83110669 A EP 83110669A EP 0111687 B1 EP0111687 B1 EP 0111687B1
Authority
EP
European Patent Office
Prior art keywords
metal
forming punch
forming
punch
blank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP83110669A
Other languages
German (de)
English (en)
Other versions
EP0111687A3 (en
EP0111687A2 (fr
Inventor
Werner Bode
Peter Franz
Werner Dipl.-Ing. Ross
Günter Schulze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0111687A2 publication Critical patent/EP0111687A2/fr
Publication of EP0111687A3 publication Critical patent/EP0111687A3/de
Application granted granted Critical
Publication of EP0111687B1 publication Critical patent/EP0111687B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the invention is based on a method for producing a commutator segment ring according to the preamble of the main claim.
  • a method is already known in which a commutator segment ring is produced by extrusion.
  • the profile of the inner ribs forming the commutator segments is not fully developed at least in one end section. This is due, for example, to the impeded flow of material due to friction at the start of the forming process and the lack of force to overcome the effects of friction.
  • a disadvantage of the known commutator segment rings is therefore that the anchoring means to be formed at the inner end of each commutator segment cannot be molded over the entire length of the commutator segment with the same cross section. Not enough material is available in the end sections of the individual segments.
  • the segments cannot be attached to their entire length in the insulating body of the commutator in a centrifugal manner. This leads to the segments being torn out of the insulating body, particularly in the case of commutators in high-speed electrical machines.
  • the inventive method with the characterizing features of the main claim has the advantage that the inner ribs of the commutator segment ring produced by the method have the full cross-section over the entire length.
  • the anchoring means projecting, for example, in the circumferential direction into the segment partial grooves can be completely formed over the entire length of the commutator segments, the commutator segments can be anchored over their entire length in the insulating body of the commutator and such commutators can be used as sufficiently spin-resistant in fast-running electrical machines.
  • Another advantage is that the inventive method is carried out with a forming tool that can be formed from a ring-shaped blank by means of a split punch design in an interrupted working stroke with relatively little effort.
  • FIG. 1 shows a blank for a commutator segment ring and FIG. 2 shows the commutator segment ring, in each case in longitudinal section, FIG. 3 shows the commutator segment ring in cross section along the line 111-111 in FIG. 2, and FIG. 4 shows a first exemplary embodiment of a forming tool for forward extrusion at the end of the first section of the Working stroke, Figure 5 shows the forming tool at the end of the working stroke, Figure 6 shows a second embodiment of a forming tool for backward extrusion at the end of the first section of the working stroke and Figure 7 shows the forming tool at the end of the working stroke; the forming tools are shown in Figures 4 to 7 in longitudinal section.
  • a blank 1 for a commutator segment ring 2 of a commutator is made of a material suitable for commutators, for example copper.
  • the blank 1 has the shape of a ring with a round or rectangular cross section.
  • the blank 1 can be a section 4 of a hollow cylinder.
  • the blank 1 can be formed from a strand section which is bent into a ring.
  • a shaft 3 with a flange 4 is formed at one end from the annular blank 1 in an inventive method.
  • a plurality of axial inner ribs, which are arranged at the same angular distance from one another, are formed on the inside of the blank by means of a die.
  • the inner ribs form the starting shape for commutator segments 5, which are separated from one another by segment partial grooves 6 and are connected only on the circumference by narrow webs 7.
  • the cold forming of the blank 1 in the commutator segment ring 2 takes place in a multi-part forming tool in one operation with two sections of the working stroke. There is a short pause of adjustable duration between the two sections of the working stroke.
  • FIGS. 4 and 5 A first embodiment of the forming tool for forward extrusion is shown in FIGS. 4 and 5, specifically in FIG. 4 at the end of the first section and in FIG. 5 at the end of the second section of the working stroke.
  • a lower stamp plate 8 is provided with a bore 9 into which a hollow cylindrical die 10 is inserted.
  • the end face 11 of the die 10 is identical to the shape of the flange 4 of the commutator segment ring 2 to be formed.
  • a lower punch which serves as a counter punch 13 and ejector.
  • the counter-punch 13 has a short cylindrical end section 14 with a somewhat smaller diameter.
  • a ring stamp 16 is fastened in a central stamp plate 15, which is movable relative to the lower stamp plate 8. Its outer diameter corresponds to the diameter of the bore 9 of the lower stamp plate 8.
  • the ring stamp 16 has an inner bore provided with longitudinal teeth 17.
  • the teeth 17 have the profile of the commutator segments 5.
  • an upper die is guided as a longitudinally movable die 18. It is supported on a spring arrangement 19 of a tool control, which is operatively connected to an upper stamp plate 20.
  • the middle and the upper stamp plate 15 and 20 are movable with each other and relative to each other.
  • the shaping stamp 18 is provided on the circumference of its shaping section with teeth 21 formed on it at the same angular distance from one another, the profile of which corresponds to the segment grooves 6 of the commutator segment ring 2 and which extend between the teeth 17 of the ring stamp 16.
  • the middle and the upper stamp plate 15 and 20 as well as the ring stamp 16 and form stamp 18 forming the divided forming stamp are held in their uppermost position for inserting the blank 1.
  • the form stamp 18 is retracted behind the end face 22 of the ring stamp 16.
  • the counter-punch 13 is pushed so far into the bore 12 of the die 10 that its end face 23 is about the thickness of the flange 4 to be molded back relative to the end face 11 of the die 10.
  • the blank 1 is inserted into the bore 9 of the lower punch plate 8 so that it lies on the end face 11 of the die 10 which forms the workpiece support.
  • the middle and the upper punch plates 15 and 20 with the ring punch 16 and the shaping punch 18 are first moved towards the blank 1. Ring and form punches 16 and 18 move in the same direction during forward extrusion. If the Rlngstempel 16 now guided in the bore 9 of the lower stamp plate 8 rests on the blank 1, it is stopped and only the shaping stamp 18 is moved further into the blank 1 until it rests on the end face 23 of the counter-stamp 13 and the upper stamp plate 20 sits on the ring stamp 16 or the central stamp plate 15. Form and counter stamps 18 and 13 are held together in this position in a manner known per se and not shown in a pressure-tight manner.
  • the ring punch 16 then shapes the blank 1, moving further into the bore 9 with respect to the shape punch 18.
  • the excess material of the blank 1 is displaced into the die 10 up to the counter-punch 13 and forms a shaft attachment 24 for the commutator segment ring 2.
  • the profile of the die 4 is formed along the shape die 18 in the preliminary stage of the flange 4 and the shaft attachment 24 inner ribs serving as later commutator segments 5 completely. No stamp movement takes place during this period, so that the first section of the working stroke was ended beforehand (FIG. 4).
  • the narrow annular gap 25 formed by the end section 14 of the counter punch 13 and the bore 12 of the die 10 supports the complete formation of the profile of the inner ribs, in particular in the end section of the shaft 3 to be molded on the commutator segment ring 2 at the end of the first section of the working stroke, by the inclusion of extruded material.
  • the counter-punch 13 is moved back into its lower fixed end position in the bore 12, which limits the length of the shaft 3 of the commutator segment ring 2.
  • the middle and the upper stamp plate 15 and 20 are moved towards the lower holding plate 8 until the middle stamp plate 15 rests on the lower stamp plate 8.
  • the co-moving ring punch 16 has then brought the flange 4 into its final shape, while the shaping punch 18 is still supported by the force of the spring arrangement 19 and entrained by the frictional force during the material flow between the extruded material and the tooth profile until the new contact on the end face 23 of the counter-punch 13 moves into the die 10, so that the shaft 3 is formed with a full inner rib profile (FIG. 5). Then the end of the stroke is reached.
  • the commutator segment ring 2 is then pushed with the tool open by the counter-punch 13 as an ejector when returning to its initial position in the removal position.
  • the commutator segment ring 2 can then be freed from the edge formed in the annular gap 25 in a manner known per se and not shown in detail, and can be provided with anchoring means and an insulating material hub in which the commutator segments 5 are anchored.
  • the commutator segments 5 are then separated by removing the webs 7 and connecting lugs formed in the flange 4 are provided with flag slots, and the commutator is thus completed.
  • FIGS. 6 and 7 A second embodiment of the forming tool for backward extrusion is shown in simplified form in FIGS. 6 and 7, specifically in FIG. 6 at the end of the first section and in FIG. 7 at the end of the second section of the working stroke. As far as the parts are the same as those of the 4 and 5, they have the same reference numbers.
  • a guide plate 26 is provided with a longitudinal bore 27, in which a lower punch as a shaping punch 18 is guided to be longitudinally movable.
  • the upper end of the die 18 is provided with the teeth 21 in the profile of the segment grooves 6.
  • the spring arrangement 19 of the tool control which is not shown here, in turn acts on the lower end face of the forming die 18.
  • the lower stamp plate 8 is fastened, in the bore 9 of which the hollow cylindrical die 10 is inserted.
  • the bore 12 of the die 10 is provided with teeth 28 running in the longitudinal direction, which have the profile of the commutator segments 5.
  • the end face 11 of the die 10 in turn forms the workpiece support.
  • the ring stamp 16 which is fixedly arranged in the middle stamp plate 15 and which forms the split forming stamp with the forming stamp 18, moves in the opposite direction to the forming stamp 18 during backward extrusion.
  • the upper stamp which serves here as counter-stamp 13 is guided.
  • the counter punch 13 has the end portion 14 with the smaller diameter at the lower end.
  • the upper end of the counter-punch 13 is provided with a collar 30 which is guided in an enlarged end section 31 of the longitudinal bore 29 which merges into the longitudinal bore 29 via an annular shoulder 32.
  • a control stamp of an adjustable elastic control means is also applied to the end face 33 of the collar 30 in a manner known per se and not shown in detail.
  • the central stamp plate 15 with the ring stamp 16 and the counter-stamp 13, 30 guided in the ring stamp 16, 29, 31 is held in the uppermost position away from the lower stamp plate 8.
  • the counter stamp 13 rests with its collar 30 on the ring shoulder 32 of the ring stamp 13.
  • the ring shoulder 32 limits the movement of the counter-punch 13 relative to the ring punch 16 in the direction of the die 10.
  • the axial distance between the ring shoulder 32 and the end face 22 of the ring punch 16 and the length of the counter-punch 13 between the collar 30 and the end face 23 at the end section 14 determine the length of the shaft extension 24, which is formed in the first section of the working stroke.
  • the form punch 18 extends into the die 10, so that the end face of the form punch 18 does not protrude beyond the end face 11 of the die 10.
  • the blank 1 is inserted into the bore 9 of the lower punch plate 8 so that it lies on the end face 11 of the die 10 which forms the workpiece support.
  • the forming die 18 is pushed out of the die 10 and through the blank 1, while the middle die plate 15 with the ring die 16 is moved towards the lower die plate 8.
  • the ring stamp 16 plunges into the bore 9 by a set length and forms the blank 1 into a preliminary stage of the flange 4 of the commutator segment ring 2.
  • the excess material of the blank 1 flows into the bore 29 of the ring die 16 up to the counter-die 13, which is pressed with its end face 23 pressure-tightly against the end face of the die 18.
  • the commutator segment ring 2 is then in turn pushed with the open forming tool by the counter-punch 13 as an ejector when returning to its starting position from the bore 29 of the ring punch 16 into the removal position.
  • the commutator segment ring 2 is completed to the commutator as previously described in the first embodiment.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Forging (AREA)

Claims (7)

1. Procédé pour fabriquer un anneau segmenté de collecteur (2) avec une pluralité de nervures internes axiales (5) dans un fût (3) et avec une bride (4) à une extrémité de ce fût (3), par déformation à froid d'une ébauche annulaire (1), procédé caractérisé en ce que, au moyen d'un poinçon de mise en forme divisé (16; 18, 21) dont les différentes parties sont mobiles les unes par rapport aux autres, l'ébauche (1) placée dans un logement (10) d'un outil de mise en forme, est transformée dans une première partie de la course de travail à un stade intermédiaire comportant une bride (4) et une partie de fût (24) s'y raccordant avec un profil de nervures internes (5) complètement formé, et qu'ensuite, après l'écoulement d'un laps de temps réglable, dans une seconde partie de la course de travail, une partie (16) du poinçon de mise en forme, forme la bride (4) de l'anneau segmenté de collecteur (2), tandis que l'autre partie (18, 21) du poinçon de mise en forme accompagnant l'écoulement du matériau prolongeant la partie de fût (24) forme complètement les nervures internes (5) dans le fût (3) ainsi prolongé.
2. Procédé selon la revendication 1, caractérisé en ce que, dans une première partie de la course de travail, la partie interne (18, 21), formant les nervures axiales internes (5), du poinçon de mise en forme, est introduite dans l'ébauche (1) jusqu'à ce que son extrémité fasse saillie en direction axiale de l'écoulement prévu du matériau, au-delà de la face de la bride (4) à former, opposée à la face frontale de l'anneau segmenté de collecteur (2) à former, et s'applique de façon étanche à la pression, avec un effort élastique de pression réglable, contre un poinçon antagoniste (13, 14, 23), et ensuite la partie externe (16) du poinçon de mise en forme comportant une surface de travail (22) de forme annulaire circulaire, transforme par déplacement axial contre l'ébauche (1) alors que la partie interne (18, 21) du poinçon de mise en forme reste fixe, l'ébauche (1) au stade intermédiaire (4, 24), tandis qu'après l'écoulementdu laps de temps réglé, dans la deuxième partie de la course de travail, le poinçon antagoniste (13, 14, 23) est ramené en arrière, et la partie externe (16) du poinçon de mise en forme parcourt une faible course pour ajuster l'épaisseur de la bride, tandis que la partie interne (18, 21) du poinçon de mise en forme, parcourt une course correspondant approximativement à la longueur totale de l'anneau segmenté de collecteur (2).
3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la formation du profil complet des nervures internes (5) sur la totalité de la longueur de l'anneau segmenté de collecteur (1) est favorisée pendant la première partie de la course de travail par la formation d'un court prolongement annulaire (25) à la face frontale du tronçon de fût (24) du stade intermédiaire, et qui fait sailli au-delà de la face frontale de la partie interne (18, 21) du poinçon de mise en forme et qui s'étend autour d'une partie d'extrémité (14) de plus petit diamètre du poinçon antagoniste (13) s'appliquant de façon étanche à la pression, contre la face frontale de la partie interne (18, 21) du poinçon de mise en forme.
4. Procédé selon une des revendications 1 à 3, caractérisé en ce que le laps de temps entre les deux parties de la course de travail du poinçon divisé de mise en forme (16; 18, 21), dépendant de la machine actionnant les différentes parties (16; 18, 21) du poinçon de mise en forme, est susceptible d'être réglé directement en fonction du temps, ou bien en fonction de la course ou de l'effort.
5. Procédé selon une des revendications 1 à 4, caractérisé en ce que lors de l'ouverture de l'outil de mise en forme, l'anneau segmenté de collecteur (2) est déplacé à un niveau d'enlèvement réglable par un éjecteur jouant le rôle de poinçon antagoniste (13, 14, 23) de la partie interne (18, 21) du poinçon de mise en forme.
6. Procédé selon une des revendications 1 à 5, caractérisé en ce que la formation de l'anneau segmenté de collecteur (2) s'effectue par filage direct, auquel cas, la partie interne (18, 21), formant les nervures internes (5), du poinçon de mise en forme, est guidée dans la partie externe (16) formant la bride (4), et ces deux parties (16; 18, 21) du poinçon de mise en forme se déplaçant dans le même sens pendant la course de travail, tandis qu'un poinçon antagoniste (13, 14, 23) est guidé par rapport à la partie interne (18, 21) du poinçon de mise en forme, dans le logement (10) de l'outil de mise en forme pour l'ébauche (1).
7. Procédé selon une des revendications 1 à 5, caractérisé en ce que la formation de l'anneau segmenté de collecteur (2) s'effectue par filage avec remontée de matière, auquel cas, la partie interne (18, 21), formant les nervures internes (5), du poinçon de mise en forme, est guidée dans l'évidement (10) de l'outil de mise en forme pour l'ébauche (1), et se déplace pendant la course de travail en sens opposé par rapport à la partie externe (16) du poinçon de mise en forme, formant la bride (4) et guidant un poinçon antagoniste (13, 14, 23) vers la partie interne (18, 21) du poinçon de mise en forme.
EP83110669A 1982-11-19 1983-10-26 Méthode de fabrication d'une bague de segments de commutateur Expired EP0111687B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3242703 1982-11-19
DE19823242703 DE3242703A1 (de) 1982-11-19 1982-11-19 Verfahren zum herstellen eines kommutatorsegmentringes

Publications (3)

Publication Number Publication Date
EP0111687A2 EP0111687A2 (fr) 1984-06-27
EP0111687A3 EP0111687A3 (en) 1986-07-16
EP0111687B1 true EP0111687B1 (fr) 1988-01-07

Family

ID=6178453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83110669A Expired EP0111687B1 (fr) 1982-11-19 1983-10-26 Méthode de fabrication d'une bague de segments de commutateur

Country Status (5)

Country Link
US (1) US4667394A (fr)
EP (1) EP0111687B1 (fr)
JP (1) JPS59103542A (fr)
DE (2) DE3242703A1 (fr)
SU (1) SU1371512A3 (fr)

Families Citing this family (11)

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Publication number Priority date Publication date Assignee Title
JPH05219690A (ja) * 1991-02-28 1993-08-27 Hitachi Ltd セラミックス摺動集電体
US5600992A (en) * 1994-02-10 1997-02-11 Hidaka Seiki Kabushiki Kaisha Die set
DE19514795C1 (de) * 1995-04-21 1996-06-05 Anton Holzhauer Umformtechnik Verfahren zur Herstellung eines Kommutators
FR2754647B1 (fr) * 1996-10-16 1998-12-31 Rockwell Lvs Procede de fabrication d'un collecteur de machine tournante et collecteur fabrique selon ce procede
SE512119C2 (sv) * 1998-06-29 2000-01-31 Eric Wirgarth Pressverktyg för sänksmide och förfarande vid sänksmide med detta verktyg
US6242839B1 (en) 2000-03-01 2001-06-05 Kirkwood Industries, Inc. Commutator and method for manufacturing
KR20020050192A (ko) * 2002-04-17 2002-06-26 권진하 플렌지형 정류자 제조방법
DE102007055040B4 (de) * 2007-11-17 2013-08-29 Amphenol-Tuchel Electronics Gmbh Kontaktelement und Verfahren zur Herstellung eines Kontaktelementes
JP5901279B2 (ja) 2011-01-31 2016-04-06 トライス株式会社 カーボンコンミテータ及びその製造方法
CN102489643B (zh) * 2011-12-21 2014-03-19 宁波华德汽车零部件有限公司 一种汽车发电机用铜环的冷镦制造工艺
WO2013149270A1 (fr) * 2012-04-03 2013-10-10 Thyssenkrup Presta Aktiengesellschaft Procédé de production d'un tourillon extrudé

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BE561328A (fr) *
US561328A (en) * 1896-06-02 Island
FR1079541A (fr) * 1952-06-24 1954-11-30 Hoover Ltd Perfectionnement aux collecteurs de dynamos
US3423819A (en) * 1966-12-12 1969-01-28 Ford Motor Co Method of forming relatively straight lengths of metal into elongated members
US3608350A (en) * 1969-03-04 1971-09-28 Terumoto Yamaguchi Apparatus and method for producing blanks for commutators for miniature electric devices
JPS4837761B1 (fr) * 1969-06-13 1973-11-13
DE1934213C3 (de) * 1969-07-05 1980-07-10 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur Herstellung eines Kommutators
US3768295A (en) * 1972-02-08 1973-10-30 Reynolds Metals Co Forming apparatus and method
JPS5017353A (fr) * 1973-06-19 1975-02-24
JPS585515B2 (ja) * 1974-03-13 1983-01-31 株式会社デンソー カイテンデンキヨウセイリユウシノ セイゾウホウホウ
JPS5939533B2 (ja) * 1975-08-16 1984-09-25 イケダ ツギノブ 並列糸分離方法
US4299112A (en) * 1977-10-20 1981-11-10 Kabushiki Kaisha Wako Method and device for producing synchronizer ring
US4463590A (en) * 1982-02-25 1984-08-07 The Harris-Thomas Drop Forge Company Forging method

Also Published As

Publication number Publication date
US4667394A (en) 1987-05-26
SU1371512A3 (ru) 1988-01-30
JPS59103542A (ja) 1984-06-15
EP0111687A3 (en) 1986-07-16
EP0111687A2 (fr) 1984-06-27
DE3242703A1 (de) 1984-05-24
DE3375260D1 (en) 1988-02-11

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